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Document and Entity Information
 12 Months Ended
Dec. 31, 2011
Mar. 31, 2012
Document and Entity Information [Abstract]    
Document Type 20-F  
Amendment Flag false  
Document Period End Date Dec. 31, 2011  
Entity Registrant Name BOS BETTER ONLINE SOLUTIONS LTD  
Entity Central Index Key 0001005516  
Current Fiscal Year End Date --12-31  
Document Fiscal Period Focus FY  
Document Fiscal Year Focus 2011  
Entity Filer Category Non-accelerated Filer  
Entity Common Stock, Shares Outstanding 4,467,924 4,471,637
Entity Current Reporting Status Yes  
Entity Well-known Seasoned Issuer No